:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #647087;
  --line: #dce2eb;
  --surface: #ffffff;
  --soft: #f5f7fb;
  --blue: #0b39f5;
  --blue-dark: #0827b8;
  --green: #28ed86;
  --shadow: 0 24px 70px rgba(28, 46, 92, 0.14);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 84% 10%, rgba(40, 237, 134, 0.13), transparent 24rem),
    radial-gradient(circle at 8% 18%, rgba(11, 57, 245, 0.09), transparent 28rem),
    var(--surface);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(11, 57, 245, 0.28);
  outline-offset: 3px;
}

.lang {
  display: none;
}

body[data-language="zh"] .lang-zh,
body[data-language="en"] .lang-en {
  display: revert;
}

body[data-language="zh"] .hero-title-zh,
body[data-language="en"] .hero-title-en {
  display: block;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  color: #fff;
  background: var(--blue);
  border-radius: 0.75rem;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
.hero,
.section,
.release-strip,
footer {
  width: min(1180px, calc(100% - 3rem));
  margin-inline: auto;
}

.site-header {
  min-height: 84px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
}

.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand img,
.footer-brand img {
  border-radius: 0.7rem;
  box-shadow: 0 7px 18px rgba(11, 57, 245, 0.22);
}

.nav-links {
  display: flex;
  gap: 1.6rem;
  align-items: center;
  font-size: 0.92rem;
  font-weight: 650;
}

.nav-links a,
.footer-links a {
  color: var(--muted);
  transition: color 160ms ease;
}

.nav-links a:hover,
.footer-links a:hover {
  color: var(--blue);
}

.language-switch {
  justify-self: end;
  display: inline-flex;
  gap: 0.2rem;
  padding: 0.22rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.82);
}

.language-switch button {
  min-width: 2.4rem;
  min-height: 2.25rem;
  border: 0;
  border-radius: 0.56rem;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.language-switch button[aria-pressed="true"] {
  color: #fff;
  background: var(--ink);
}

.hero {
  min-height: 670px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7rem);
  padding-block: 5.5rem 6.5rem;
}

.eyebrow,
.section-kicker {
  margin: 0 0 1.25rem;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.status-dot {
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(40, 237, 134, 0.17);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(3.5rem, 6.4vw, 6rem);
  line-height: 1;
  letter-spacing: -0.042em;
}

h1 em {
  color: var(--blue);
  font-style: normal;
}

.title-line {
  display: block;
  white-space: nowrap;
}

.hero-title-zh {
  font-size: 0.8em;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.hero-title-en {
  letter-spacing: -0.032em;
}

.hero-description {
  max-width: 630px;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  min-height: 3.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  padding: 0.8rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 0.9rem;
  font-size: 0.95rem;
  font-weight: 780;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 12px 24px rgba(11, 57, 245, 0.24);
}

.button-primary:hover {
  background: var(--blue-dark);
  box-shadow: 0 16px 30px rgba(11, 57, 245, 0.3);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.trust-line {
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.demo-card {
  position: relative;
}

.demo-card::before {
  content: "";
  position: absolute;
  inset: 7% -5% -8% 9%;
  z-index: -1;
  border-radius: 3rem;
  background: linear-gradient(145deg, rgba(11, 57, 245, 0.13), rgba(40, 237, 134, 0.19));
  filter: blur(18px);
}

.demo-window {
  overflow: hidden;
  border: 1px solid rgba(17, 24, 39, 0.11);
  border-radius: 1.65rem;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  transform: rotate(1.2deg);
}

.window-bar {
  height: 3.15rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0 1rem;
  border-bottom: 1px solid var(--line);
  background: #f7f8fb;
}

.window-bar > span {
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  background: #cbd1da;
}

.address-bar {
  min-width: 0;
  flex: 1;
  margin-left: 0.45rem;
  padding: 0.34rem 0.75rem;
  overflow: hidden;
  color: #7a8495;
  border: 1px solid #e2e6ed;
  border-radius: 0.55rem;
  background: #fff;
  font-size: 0.7rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-content {
  padding: clamp(2rem, 5vw, 3.8rem);
}

.demo-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 720;
  text-align: center;
}

.key-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  margin: 1.5rem 0 2rem;
  color: #8c96a8;
  font-weight: 700;
}

kbd {
  min-width: 3.7rem;
  min-height: 3.7rem;
  display: grid;
  place-items: center;
  border: 1px solid #cfd5df;
  border-bottom-width: 4px;
  border-radius: 0.85rem;
  color: var(--ink);
  background: linear-gradient(#fff, #f5f6f9);
  font-family: inherit;
  font-size: 1.45rem;
  font-weight: 750;
}

.mouse {
  width: 3.1rem;
  height: 3.8rem;
  display: grid;
  place-items: center;
}

.mouse svg {
  width: 2.3rem;
  fill: #fff;
  stroke: var(--ink);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

.mouse .mouse-click {
  fill: rgba(40, 237, 134, 0.42);
  stroke: none;
}

.link-preview {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  color: var(--blue);
  border: 1px solid rgba(11, 57, 245, 0.13);
  border-radius: 0.9rem;
  background: rgba(11, 57, 245, 0.045);
  font-size: 0.9rem;
  font-weight: 680;
}

.link-icon,
.check {
  width: 1.65rem;
  height: 1.65rem;
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 0.5rem;
}

.link-icon {
  color: #fff;
  background: var(--blue);
}

.success-message {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 1rem;
  padding: 0.82rem;
  border-radius: 0.85rem;
  background: #eafff3;
  font-size: 0.88rem;
  font-weight: 760;
}

.check {
  background: var(--green);
}

.release-strip {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  padding: 1.4rem 1.55rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 10px 30px rgba(21, 38, 82, 0.06);
}

.release-strip .section-kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.66rem;
}

.release-strip strong {
  font-size: 1.2rem;
}

.checksum {
  min-width: 0;
}

.checksum > span {
  display: block;
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 720;
}

.checksum code {
  display: block;
  overflow: hidden;
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.copy-button {
  min-height: 2.6rem;
  padding: 0.58rem 0.85rem;
  color: var(--blue);
  border: 1px solid rgba(11, 57, 245, 0.18);
  border-radius: 0.75rem;
  background: rgba(11, 57, 245, 0.06);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 760;
  cursor: pointer;
}

.copy-button:hover {
  background: rgba(11, 57, 245, 0.1);
}

.copy-status {
  position: absolute;
  right: 1.55rem;
  bottom: -2rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.section {
  padding-block: 9rem 2rem;
}

.section-heading {
  max-width: 690px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.25rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.section-heading > p:last-child {
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 3.5rem;
}

.feature-grid article {
  min-height: 300px;
  padding: 1.6rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.74);
}

.feature-number {
  color: var(--blue);
  font-size: 0.73rem;
  font-weight: 850;
  letter-spacing: 0.1em;
}

.feature-grid h3 {
  margin: 5rem 0 0.6rem;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.feature-grid p {
  margin: 0;
  color: var(--muted);
}

.install-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(420px, 1.2fr);
  gap: clamp(3rem, 9vw, 8rem);
  align-items: start;
  padding-bottom: 9rem;
}

.install-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.install-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.2rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
}

.install-steps li:first-child {
  padding-top: 0;
}

.step-number {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 0.6rem;
  background: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
}

.install-steps h3 {
  margin: 0;
  font-size: 1.08rem;
}

.install-steps p {
  margin: 0.32rem 0 0;
  color: var(--muted);
}

.install-steps code {
  color: var(--blue);
  font-size: 0.92rem;
  font-weight: 680;
}

.install-button {
  grid-column: 2;
  justify-self: start;
}

footer {
  min-height: 120px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
}

footer > p {
  text-align: center;
}

.footer-links {
  justify-self: end;
  display: flex;
  gap: 1rem;
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 4rem;
  }

  .demo-card {
    width: min(540px, 100%);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid article {
    min-height: 220px;
  }

  .feature-grid h3 {
    margin-top: 3.2rem;
  }

  .install-section {
    grid-template-columns: 1fr;
  }

  .install-button {
    grid-column: 1;
  }

  footer {
    grid-template-columns: 1fr;
    gap: 0.7rem;
    padding-block: 2rem;
    text-align: center;
  }

  .footer-brand,
  .footer-links {
    justify-self: center;
  }

  footer > p {
    margin: 0;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .section,
  .release-strip,
  footer {
    width: min(100% - 2rem, 1180px);
  }

  .site-header {
    min-height: 72px;
  }

  .hero {
    gap: 3.8rem;
    padding-block: 3.5rem 4.5rem;
  }

  h1 {
    font-size: clamp(2.85rem, 15vw, 4.25rem);
  }

  .hero-title-zh {
    font-size: 0.82em;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .demo-content {
    padding: 2rem 1.2rem;
  }

  .key-row {
    gap: 0.4rem;
  }

  kbd {
    min-width: 3rem;
    min-height: 3.2rem;
  }

  .release-strip {
    grid-template-columns: 1fr auto;
    gap: 1rem;
  }

  .checksum {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .copy-button {
    grid-column: 2;
    grid-row: 1;
  }

  .section {
    padding-top: 6.5rem;
  }

  .install-section {
    padding-bottom: 6.5rem;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}